From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baruch Siach Date: Tue, 4 Mar 2014 08:18:24 +0200 Subject: [Buildroot] readonly rootfs problem In-Reply-To: <5314FED7.80903@alcatel-lucent.com> References: <5314FED7.80903@alcatel-lucent.com> Message-ID: <20140304061824.GY3874@tarshish> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hi Ed, On Mon, Mar 03, 2014 at 05:14:47PM -0500, Ed Sutter wrote: > I've been using buildroot to create my rootfs for a few months. > I build my kernel directly out of freescale.git. > I had been running with my rootfs nfs mounted, and all was well. > Recently I had spent some time with a ramdisk-based rootfs because > i was working on some kernel stuff. > Now I'm going back to running rootfs/nfs and I'm finding that > it "insists" on coming up in read-only mode. > > I was initially using buildroot-2013.08, and recently I > updated to buildroot-2013.11; however, I don't think that has > anything to do with this. As far as I can tell I have everything > set up properly... > > ####On NFS host /etc/exports has... > /full_path_to_my_rootfs *(rw,no_root_squash) > > ####On target... > /etc/inittab... > null::sysinit:/bin/mount -o remount,rw / # REMOUNT_ROOTFS_RW > > /etc/fstab... > # /etc/fstab: static file system information. > # > # > /dev/root / ext2 rw,noauto 0 1 > proc /proc proc defaults 0 0 > devpts /dev/pts devpts defaults,gid=5,mode=620 0 0 > tmpfs /dev/shm tmpfs mode=0777 0 0 > tmpfs /tmp tmpfs defaults 0 0 > sysfs /sys sysfs defaults 0 0 > > Output from mount: > # mount > rootfs on / type rootfs (rw) > 1.2.3.4:/full_path_to_my_rootfs on / type nfs (ro,relatime,vers=3,rsize=4096,wsize=4096,namlen=255,hard,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=1.2.3.4,mountvers=3,mountproto=tcp,local_lock=all,addr=135.222.138.108) > devtmpfs on /dev type devtmpfs > (rw,relatime,size=110708k,nr_inodes=27677,mode=755) > proc on /proc type proc (rw,relatime) > devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620) > tmpfs on /dev/shm type tmpfs (rw,relatime,mode=777) > tmpfs on /tmp type tmpfs (rw,relatime) > sysfs on /sys type sysfs (rw,relatime) > > I actually think the problem is in the kernel, not the rootfs. > I say this because even some of my older rootfs copies (still on my > host) are now > showing up as read only. The bootlog always ends up with this message: > VFS: Mounted root (nfs filesystem) readonly on device 0:11. > > Any idea what I might be doing wrong here? What happens if you manually run: mount -o remount,rw / Do you see any error message? baruch -- http://baruch.siach.name/blog/ ~. .~ Tk Open Systems =}------------------------------------------------ooO--U--Ooo------------{= - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -